Initial volume of water: 22.60 Final volume of water (with rubber stopper): 26.3
ID: 711997 • Letter: I
Question
Initial volume of water: 22.60 Final volume of water (with rubber stopper): 26.33 Mass of rubber stopper: 3.81g18510/Mew 80% C Search M McGraw Hill Conne mynwceduLaramie C g.com Fabletics Boutique ( ) Dental Hygiene-Lc Experiment G: Density of A Rubber Stopper Purpose: To determine the density (g/mL) of a rubber stopper by water displacement. Turn the balance on and make sure the display on the balance reads in grams (g). Add at least 5 m of water to the 25-mL graduated cylinder, and record the volume to the nearest tenth of a milliliter. Place the graduated cylinder with the initial amount of water on the balance and press the Tare button to zero the balance. Remove the graduated cylinder from the balance and tilt it at an angle of about 45 degrees. Carefully add to it the black rubber stopper, making sure that no water is splashed out of the graduated cylinder. Record the final water level in the graduated cylinder to the nearest tenth of a milliliter. Now place the graduated cylinder, water, and rubber stopper on the balance and record the mass reading shown on the balance to the nearest hundredth of a gram. This reading gives the mass of the rubber stopper since the balance is set at zero before adding the rubber stopper to the graduated cylinder To calculate density, you need to know the volume of the rubber stopper and their mass. When the rubber stopper is added to the water they displace a volume of water equal to their own volume. To find the volume of the rubber stopper subtract the initial volume of the water from the final volume of water; record this value. Calculate the density of the metal objects. Round all your answers to the correct number of significant digits and write the answers with the correct units. In the Data section, make an appropriate data table (an example data table is shown below) to display all your answers and be sure to include the unit of each number in your table. In the Calculations Section show all your calculations clearly. Initial Volume of Water Final Volume of Water (with rubber stopper added) Mass of rubber stopper Volume of rubber stopper Density of rubber stopper 26 MacBook Ai
Explanation / Answer
To determine density of the rubber stopper divide mass of rubber stopper by its volume; density = mass/ volume
Mass of rubber stopper = 3.81g
Volume of the rubber stopper = Final volume of water (with rubber stopper) - initial volume of water
Volume of rubber stopper = 26.33 - 22.60 = 3.73mL
Since 1mL = 1cm3; hence volume of rubber stopper is 3.73 cm3
Density of rubber stopper = mass of rubber stopper/ volume of rubber stopper
Density of rubber stopper = 3.81g/ 3.73cm3 = 1.02g/cm3
Initial volume of water 22.60mL Final volume of water (with rubber stopper) 26.33mL Mass of rubber stopper 3.81g Volume of rubber stopper 3.75mL or 3.73cm3 Density of rubber stopper 1.02g/cm3